147 years old now in 2023 - what year born?

Today, 5 June 2023 if a person is 147 years old now, what year was he born? See below:

If 147 years old, year of birth is:
1875 or 1876*

*It depends on whether he was born before or after 1 January 1876.

If now 147 years and his year of birth 1875 if he was born after 5 June 1875 until 31 december 1875 inclusively, and his year of birth is 1876 if he was born from 1 January 1876 to 5 June 1876.

Other examples:

If now 9 years, year of birth 2013 or 2014
If now 13 years, year of birth 2009 or 2010
If now 22 years, year of birth 2000 or 2001
If now 70 years, year of birth 1952 or 1953

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